circuitpython/shared-bindings/hashlib/__init__.c

89 lines
3.3 KiB
C

/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2022 Scott Shawcroft for Adafruit Industries
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <string.h>
#include "py/obj.h"
#include "py/mpconfig.h"
#include "py/runtime.h"
#include "shared-bindings/hashlib/__init__.h"
#include "shared-bindings/hashlib/Hash.h"
//| """Hashing related functions
//|
//| |see_cpython_module| :mod:`cpython:hashlib`.
//| """
//|
//| def new(name: str, data: bytes = b"") -> hashlib.Hash:
//| """Returns a Hash object setup for the named algorithm. Raises ValueError when the named
//| algorithm is unsupported.
//|
//| :return: a hash object for the given algorithm
//| :rtype: hashlib.Hash"""
//| ...
//|
STATIC mp_obj_t hashlib_new(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
enum { ARG_name, ARG_data };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_name, MP_ARG_REQUIRED | MP_ARG_OBJ },
{ MP_QSTR_data, MP_ARG_OBJ, {.u_obj = mp_const_none} },
};
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
const char *algorithm = mp_obj_str_get_str(args[ARG_name].u_obj);
hashlib_hash_obj_t *self = mp_obj_malloc(hashlib_hash_obj_t, &hashlib_hash_type);
if (!common_hal_hashlib_new(self, algorithm)) {
mp_raise_ValueError(MP_ERROR_TEXT("Unsupported hash algorithm"));
}
if (args[ARG_data].u_obj != mp_const_none) {
hashlib_hash_update(self, args[ARG_data].u_obj);
}
return self;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(hashlib_new_obj, 1, hashlib_new);
STATIC const mp_rom_map_elem_t hashlib_module_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_hashlib) },
{ MP_ROM_QSTR(MP_QSTR_new), MP_ROM_PTR(&hashlib_new_obj) },
// Hash is deliberately omitted here because CPython doesn't expose the
// object on `hashlib` only the internal `_hashlib`.
};
STATIC MP_DEFINE_CONST_DICT(hashlib_module_globals, hashlib_module_globals_table);
const mp_obj_module_t hashlib_module = {
.base = { &mp_type_module },
.globals = (mp_obj_dict_t *)&hashlib_module_globals,
};
MP_REGISTER_MODULE(MP_QSTR_hashlib, hashlib_module);